Display device and electronic equipment

Abstract

The present application relates to a display device and an electronic device, wherein the display device includes a middle frame and a display module. The middle frame includes a first body, a second body and a third body. The display module includes a first fixing portion, a first bending portion, a second fixing portion, a second bending portion and a third fixing portion. When the display device is in a folded state, the first bending portion includes a first sub-bending portion and a second sub-bending portion connected to each other; the first sub-bending portion and the second sub-bending portion are arranged relative to each other along a first plane, the first plane is perpendicular to the thickness direction of the display device, and the distances between the first plane and the plane where the first fixing portion is located and the plane where the second fixing portion is located are equal. The maximum distance between the first sub-bending portion and the first plane along the thickness direction of the display device is a first distance A, and the maximum distance between the second sub-bending portion and the first plane along the thickness direction of the display device is a second distance B, and 0.9≤A / B≤1.1. In this way, the service life of the display device can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and an electronic device. Background Art

[0002] Flexible screen design is a future development direction, and flexible screens are increasingly being used in terminal devices. In terminal devices, flexible screens are usually combined with flexible screen support structures, which are used to achieve folding and unfolding of the flexible screen, thus forming a foldable screen in the terminal device. However, tri-fold products usually require two bending zones. However, when one side is bent, the film layer shifts, causing compression on the bending zone on the other side, causing the bending shape to shift, resulting in a shorter service life of the display device. Summary of the Invention

[0003] Based on this, it is necessary to provide a display device and an electronic device that can increase the service life.

[0004] In a first aspect, an embodiment of the present application provides a display device, comprising:

[0005] The middle frame includes a first body, a second body, and a third body arranged in sequence, with two ends of the second body connected to the first body and the third body respectively;

[0006] The display module is held on the middle frame and includes a first fixing portion, a first bending portion, a second fixing portion, a second bending portion, and a third fixing portion arranged in sequence, wherein the first fixing portion is held on the first body, the second fixing portion is held on the second body, and the third fixing portion is held on the third body;

[0007] When the display device is in a folded state, the first bending portion includes a first sub-bending portion and a second sub-bending portion that are connected to each other, the first sub-bending portion being connected to the first fixing portion, and the second sub-bending portion being connected to the second fixing portion; the first sub-bending portion and the second sub-bending portion being arranged opposite to each other along a first plane, the first plane being perpendicular to a thickness direction of the display device, and the first plane being equidistant from the plane where the first fixing portion is located and the plane where the second fixing portion is located;

[0008] The maximum distance between the first sub-bending portion and the first plane along the thickness direction of the display device is a first distance A, and the maximum distance between the second sub-bending portion and the first plane along the thickness direction of the display device is a second distance B. The first distance A and the second distance B satisfy the following conditions: 0.9≤A / B≤1.1.

[0009] In the display device provided in an embodiment of the present application, when the display device is in a folded state, the first sub-bend portion is connected to the first fixing portion, and the second sub-bend portion is connected to the second fixing portion; the first sub-bend portion and the second sub-bend portion are arranged opposite each other along a first plane, the first plane being perpendicular to the thickness direction of the display device, and the distances between the first plane and the plane containing the first fixing portion and the plane containing the second fixing portion are equal. Furthermore, the maximum distance between the first sub-bend portion and the first plane along the thickness direction of the display device is a first distance A, and the maximum distance between the second sub-bend portion and the first plane along the thickness direction of the display device is a second distance B, and the first distance A and the second distance B satisfy the following condition: 0.9≤A / B≤1.1. In this way, when the first bending portion and the second bending portion are both bent to form a folded state, when one of the first bending portion and the second bending portion causes an extrusion effect on the other during the bending process, since the maximum distance between the first sub-bending portion and the first plane along the thickness direction of the display device is the first distance A, and the maximum distance between the second sub-bending portion and the first plane along the thickness direction of the display device is the second distance B, the first distance A and the second distance B satisfy the following conditions: 0.9≤A / B≤1.1, thereby reducing the deviation of the bending shape of the first bending portion caused by the extrusion of the second bending portion on the first bending portion, and further reducing the asymmetry of the first bending portion when the display device is in a folded state, and further reducing the problem of film layer dislocation and separation caused by the asymmetry of the first bending portion, and ultimately improving the service life of the display device.

[0010] In one embodiment, when the display device is in the folded state, the second bending portion includes a third sub-bending portion and a fourth sub-bending portion that are connected to each other, the third sub-bending portion is connected to the third fixing portion, and the fourth sub-bending portion is connected to the second fixing portion; the third sub-bending portion and the fourth sub-bending portion are arranged opposite each other along a second plane, the second plane is perpendicular to the thickness direction of the display device, and the distances between the second plane and the plane where the second fixing portion and the plane where the third fixing portion are located are equal;

[0011] The maximum distance between the third sub-bend portion and the second plane along the thickness direction of the display device is a third distance C. The maximum distance between the fourth sub-bend portion and the second plane along the thickness direction of the display device is a fourth distance D. The third distance C and the fourth distance D satisfy the following condition: 0.9≤C / D≤1.1;

[0012] Optionally, the first distance A and the second distance B satisfy the following condition: A / B=1;

[0013] Optionally, the third distance C and the fourth distance D satisfy the following condition: C / D=1;

[0014] Optionally, when the display device is in a folded state, the first body and the second body are arranged opposite to each other along a thickness direction of the display device, and the first fixing portion and the second fixing portion are both located between the first body and the second body;

[0015] Optionally, when the display device is in the folded state, the third body is located on a side of the first body facing away from the second body, and the third fixing portion is located between the first body and the third body;

[0016] Optionally, when the display device is in the folded state, the third body is located on a side of the second body facing away from the first body, and the third fixing portion is located on a side of the third body facing away from the second body.

[0017] In one embodiment, the first sub-bend portion includes a first sub-portion and a second sub-portion connected to each other, wherein a side of the first sub-portion away from the second sub-portion is connected to the second sub-bend portion, and a side of the second sub-portion away from the first sub-portion is connected to the first fixing portion; the protruding direction of the first sub-portion is opposite to the protruding direction of the second sub-portion;

[0018] Optionally, the second sub-bending portion includes a third sub-portion and a fourth sub-portion connected to each other, wherein a side of the third sub-portion away from the fourth sub-portion is connected to the first sub-portion, and a side of the fourth sub-portion away from the third sub-portion is connected to the second fixing portion; and a protruding direction of the third sub-portion is opposite to a protruding direction of the fourth sub-portion.

[0019] Optionally, the first sub-section and the third sub-section are symmetrically arranged along the thickness direction of the display device;

[0020] Optionally, the second sub-portion and the fourth sub-portion are symmetrically arranged along a thickness direction of the display device.

[0021] In one embodiment, the display device further includes:

[0022] A first adhesive member is provided between the first body and the first sub-bending portion, and the first adhesive member is connected to the first body and a portion of the first sub-bending portion;

[0023] Optionally, the first adhesive member is connected to a portion of the first sub-section;

[0024] Optionally, the area of ​​the first adhesive member bonded to the first sub-section is M, the surface area of ​​the first sub-section is N, and M and N satisfy the following condition: M≤(1 / 4)N;

[0025] Optionally, the first sub-portion includes a first bending section and a second bending section that are connected, wherein a side of the first bending section away from the second bending section is connected to the second sub-bending section, and a side of the second bending section away from the first bending section is connected to the second sub-portion; along the direction from the first bending section to the second bending section, a distance between the first bending section and the first plane along the thickness direction of the display device gradually increases, and a distance between the second bending section and the first plane along the thickness direction of the display device gradually decreases;

[0026] Along the thickness direction of the display device, a projection of the first adhesive component on the first plane is located within a projection of the second bending section on the first plane.

[0027] In one embodiment, the display device further includes:

[0028] a second adhesive member disposed between the third body and the third sub-bending portion, and the second adhesive member is connected to the third body and a portion of the third sub-bending portion;

[0029] Optionally, the bonding area between the second adhesive and the third sub-bending portion is P, the surface area of ​​the third sub-bending portion is Q, and P and Q satisfy the following condition: Q≤(1 / 4)P;

[0030] Optionally, the second adhesive component is located on a side of the third sub-bending portion close to the third fixing portion.

[0031] In one embodiment, the middle frame includes:

[0032] A first support member is provided between the first body and the first sub-bending portion;

[0033] a second supporting member, disposed between the second body and the second sub-bending portion;

[0034] The first support member and the second support member are both inclined in the thickness direction of the display device, the first support member contacts the first sub-bending portion, and the second support member contacts the second sub-bending portion; the angle between the extension direction of the first support member and the first plane is θ1, and the angle between the extension direction of the second support member and the first plane is θ2, and θ1 and θ2 satisfy the following condition: θ2<θ1;

[0035] Optionally, θ1 and θ2 satisfy the following condition: 0.5°≤θ1-θ2≤2.5°;

[0036] Optionally, θ1 satisfies the following conditions: 8.5°≤θ1≤18°;

[0037] Optionally, θ2 satisfies the following condition: 8°≤θ2≤17.5°;

[0038] Optionally, the first sub-portion includes a first bending section and a second bending section that are connected, wherein a side of the first bending section away from the second bending section is connected to the second sub-bending section, and a side of the second bending section away from the first bending section is connected to the second sub-portion; along the direction from the first bending section to the second bending section, a distance between the first bending section and the first plane along the thickness direction of the display device gradually increases, and a distance between the second bending section and the first plane along the thickness direction of the display device gradually decreases;

[0039] Along the thickness direction of the display device, the projection of the first support member on the first plane is located within the projection of the second bent section on the first plane;

[0040] Optionally, the third sub-section includes a third bent section and a fourth bent section that are connected, wherein a side of the third bent section away from the fourth bent section is connected to the first bent section, and a side of the fourth bent section away from the third bent section is connected to the fourth sub-section; along the direction from the third bent section to the fourth bent section, a distance between the third bent section and the first plane along the thickness direction of the display device gradually increases, and a distance between the fourth bent section and the first plane along the thickness direction of the display device gradually decreases;

[0041] Along the thickness direction of the display device, the projection of the second support member on the first plane is located within the projection of the fourth bending segment on the first plane;

[0042] Optionally, along the thickness direction of the display device, a projection of the first support member on the first plane coincides with a projection of the second support member on the first plane.

[0043] In one embodiment, the display module includes a support layer and a display panel stacked in sequence in a direction away from the middle frame;

[0044] The elastic modulus of at least a portion of the support layer located at the first sub-bending portion is greater than the elastic modulus of at least a portion of the support layer located at the second sub-bending portion;

[0045] Optionally, the first sub-bending portion includes a first opening portion, the first opening portion is provided with a plurality of first openings; the second sub-bending portion includes a second opening portion, the second opening portion is provided with a plurality of second openings;

[0046] One side of the first opening portion is connected to the second sub-bending portion, and one side of the second opening portion is connected to the first opening portion;

[0047] The elastic modulus of the first opening portion is greater than the elastic modulus of the second opening portion;

[0048] Optionally, the sum of the areas of all the first openings in the first opening portion within a unit area is smaller than the sum of the areas of all the second openings in the second opening portion within a unit area;

[0049] Optionally, the number of the first openings is smaller than the number of the second openings;

[0050] Optionally, the area of ​​the first opening is the same as the area of ​​the second opening;

[0051] Optionally, the first sub-bending portion further includes a first non-perforated portion, one side of the first non-perforated portion is connected to a side of the first perforated portion away from the second perforated portion, and the other side of the first non-perforated portion is connected to the first fixing portion; the plurality of first openings do not overlap with the first non-perforated portion;

[0052] Optionally, the second sub-bending portion further includes a second non-perforated portion, one side of the second perforated portion is connected to the first perforated portion, one side of the second non-perforated portion is connected to a side of the second perforated portion away from the first perforated portion, and the other side of the second non-perforated portion is connected to the second fixing portion; the plurality of second openings do not overlap with the second non-perforated portion;

[0053] Optionally, the elastic modulus of at least part of the support layer located at the third sub-bending portion is greater than the elastic modulus of at least part of the support layer located at the fourth sub-bending portion;

[0054] Optionally, the third sub-bending portion includes a third opening portion, the third opening portion is provided with a plurality of third openings; the fourth sub-bending portion includes a fourth opening portion, the fourth opening portion is provided with a plurality of fourth openings;

[0055] One side of the third opening portion is connected to the fourth sub-bending portion, and one side of the fourth opening portion is connected to the third opening portion;

[0056] The elastic modulus of the third opening portion is greater than the elastic modulus of the fourth opening portion;

[0057] Optionally, the sum of the areas of all third openings in the third opening portion within a unit area is smaller than the sum of the areas of all fourth openings in the fourth opening portion within a unit area;

[0058] Optionally, the number of the third openings is less than the number of the fourth openings;

[0059] Optionally, the area of ​​the third opening is the same as the area of ​​the fourth opening;

[0060] Optionally, the third sub-bending portion further includes a third non-perforated portion, one side of the third non-perforated portion is connected to a side of the third perforated portion away from the fourth perforated portion, and the other side of the third non-perforated portion is connected to the third fixing portion; the plurality of third openings do not overlap with the third non-perforated portion;

[0061] Optionally, the fourth sub-bending portion also includes a fourth non-opening portion, one side of the fourth non-opening portion is connected to the side of the fourth opening portion away from the third opening portion, and the other side of the fourth non-opening portion is connected to the second fixed portion; the multiple fourth openings do not overlap with the fourth non-opening portion.

[0062] In one embodiment, along the direction from the first sub-bend portion to the second sub-bend portion, the distance between adjacent first openings is L1, and the distance between adjacent second openings is L2, and L1 and L2 satisfy the following condition: L1>L2;

[0063] Optionally, L1 and L2 satisfy the following condition: 1.05≤L1 / L2≤1.15;

[0064] Optionally, L2 satisfies the following conditions: 0.4 mm ≤ L2 ≤ 1.5 mm;

[0065] Optionally, along a direction intersecting the direction from the first sub-bend portion to the second sub-bend portion, the distance between adjacent first openings is L3, the distance between adjacent second openings is L4, and L3 and L4 satisfy the following condition: L3>L4;

[0066] Optionally, L3 and L4 satisfy the following condition: 1.05≤L3 / L4≤1.15;

[0067] Optionally, L4 satisfies the following conditions: 0.4 mm ≤ L4 ≤ 1.5 mm;

[0068] Optionally, along the direction from the third sub-bend portion to the fourth sub-bend portion, the distance between adjacent third openings is L5, the distance between adjacent fourth openings is L6, and L5 and L6 satisfy the following condition: L5>L6;

[0069] Optionally, L5 and L6 satisfy the following condition: 1.05≤L5 / L6≤1.15;

[0070] Optionally, L6 satisfies the following conditions: 0.4 mm ≤ L6 ≤ 1.5 mm;

[0071] Optionally, along a direction intersecting the direction from the third sub-bend portion to the fourth sub-bend portion, the distance between adjacent third openings is L7, the distance between adjacent fourth openings is L8, and L7 and L8 satisfy the following condition: L7>L8;

[0072] Optionally, L7 and L8 satisfy the following condition: 1.05≤L7 / L8≤1.15;

[0073] Optionally, L8 satisfies the following conditions: 0.4 mm ≤ L8 ≤ 1.5 mm;

[0074] Optionally, the distances between adjacent first openings are equal, the distances between adjacent second openings are equal, the distances between adjacent third openings are equal, and the distances between adjacent fourth openings are equal.

[0075] In one embodiment, the length of the first opening portion along the direction from the first sub-bend portion to the second sub-bend portion is L 11 , the length of the second opening is L 12 , L 11 and L 12 Meet the following conditions: (0.75) L 12 <L 11 <L 12 ;

[0076] Optionally, along the direction from the third sub-bend portion to the fourth sub-bend portion, the length of the third opening portion is L 13, the length of the fourth opening is L 14 , L 13 and L 14 Meet the following conditions: (0.75) L 14 <L 13 <L 14 .

[0077] In a second aspect, an embodiment of the present application provides an electronic device, comprising the display device in the first aspect.

[0078] In an electronic device provided in an embodiment of the present application, when the display device is in a folded state, the first sub-bend portion is connected to the first fixing portion, and the second sub-bend portion is connected to the second fixing portion; the first sub-bend portion and the second sub-bend portion are arranged opposite each other along a first plane, the first plane being perpendicular to the thickness direction of the display device, and the distances between the first plane and the plane containing the first fixing portion and the plane containing the second fixing portion are equal. Furthermore, the maximum distance between the first sub-bend portion and the first plane along the thickness direction of the display device is a first distance A, and the maximum distance between the second sub-bend portion and the first plane along the thickness direction of the display device is a second distance B, and the first distance A and the second distance B satisfy the following condition: 0.9≤A / B≤1.1.

[0079] In this way, when the first bending portion and the second bending portion are both bent to form a folded state, and one of the first bending portion and the second bending portion causes an extrusion effect on the other during the bending process, since the maximum distance between the first sub-bending portion and the first plane along the thickness direction of the display device is the first distance A, and the maximum distance between the second sub-bending portion and the first plane along the thickness direction of the display device is the second distance B, the first distance A and the second distance B satisfy the following conditions: 0.9≤A / B≤1.1, thereby reducing the offset of the bending shape of the first bending portion caused by the extrusion of the second bending portion on the first bending portion, and further reducing the asymmetry of the first bending portion when the display device is in a folded state, and further reducing the problem of film layer displacement and separation caused by the asymmetry of the first bending portion, and ultimately improving the service life of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0081] Figure 1 A schematic structural diagram of a display device provided in one embodiment of the present application.

[0082] Figure 2 Another structural schematic diagram of a display device provided in one embodiment of the present application.

[0083] Figure 3 This is another structural schematic diagram of a display device provided in an embodiment of the present application.

[0084] Figure 4 for Figure 3 A local enlarged view of point P in the middle.

[0085] Figure 5 This is another structural schematic diagram of a display device provided in one embodiment of the present application.

[0086] Figure 6 This is a schematic diagram of the unfolded structure of a display device provided in one embodiment of the present application.

[0087] Figure 7 This is a schematic structural diagram of the unfolded first bending portion provided in one embodiment of the present application.

[0088] Figure 8 This is a schematic structural diagram of the unfolded second bending portion provided in one embodiment of the present application.

[0089] Figure 9 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application.

[0090] Description of reference numerals:

[0091] 100. Electronic device; 10. Display device; 20. Middle frame; 21. First housing; 22. Second housing; 23. Third housing; 24. First support member; 25. Second support member; 30. Display module; 31. First fixing portion; 32. First bending portion; 321. First sub-bending portion; 3211. First sub-portion; 3211a. First bending section; 3211b. Second bending section; 3212. Second sub-portion; 3213. First opening portion; 3214. First non-opening portion; 322. Second sub-bending portion; 3221, third sub-portion; 3221a, third bending section; 3221b, fourth bending section; 3222, fourth sub-portion; 3223, second opening portion; 3224, second non-opening portion; 33, second fixing portion; 34, second bending portion; 341, third sub-bending portion; 3411, third opening portion; 3412, third non-opening portion; 342, fourth sub-bending portion; 3421, fourth opening portion; 3422, fourth non-opening portion; 35, third fixing portion; 40, first adhesive member; 50, second adhesive member;

[0092] X1Y1, first plane; X2Y2, second plane. DETAILED DESCRIPTION

[0093] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0094] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, they do not indicate any order, quantity, or importance, but are merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this application. Words such as "include" or "comprise" mean that the elements or objects that appear before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0095] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0096] Currently, flexible screen design is trending towards future development, and is increasingly being used in terminal devices. These devices typically combine a flexible screen with a flexible screen support structure, utilizing the flexible screen support structure to achieve folding and unfolding, thus forming a foldable screen within the terminal device.

[0097] It should be noted that when a foldable screen is folded through two parts of flexible screen, the foldable screen is a double-folding screen; when a foldable screen is folded through three parts of flexible screen, the foldable screen is a triple-folding screen; when a foldable screen is folded through more than three parts of flexible screen, the foldable screen is a multi-folding screen. For the sake of convenience, this application refers to double-folding products as double-folding screens, triple-folding products as triple-folding screens, and multi-folding products as multi-folding screens.

[0098] Furthermore, a double-fold product only requires one bending area to achieve the folding of a two-part flexible screen, while a tri-fold product and a multi-fold product require at least two bending areas to achieve the folding of a three-part flexible screen or a multi-part flexible screen.

[0099] Based on the above research, the applicant has found that tri-fold products typically require two bending regions. However, when one side is bent, it squeezes the bending region on the other side, causing the bending shapes of both sides to shift, making the two bending regions asymmetrical, causing the film layer to shift and separate, resulting in a shorter service life for the display device. It is understandable that since multi-fold products require multiple bending regions, any two adjacent bending regions will also be squeezed during the folding process of the multi-fold product, causing the bending shapes of the two adjacent bending regions to shift, and thus multi-fold products also have the problem of shorter service life for the display device.

[0100] First, refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a display device 10, comprising a middle frame 20 and a display module 30. The middle frame 20 comprises a first body 21, a second body 22, and a third body 23 arranged in sequence, with the ends of the second body 22 being rotatably connected to the first body 21 and the third body 23, respectively. The display module 30 is retained on the middle frame 20 and comprises a first fixing portion 31, a first bending portion 32, a second fixing portion 33, a second bending portion 34, and a third fixing portion 35 arranged in sequence. The first fixing portion 31 is retained on the first body 21, the second fixing portion 33 is retained on the second body 22, and the third fixing portion 35 is retained on the third body 23. When the display device 10 is in the folded state, the first bending portion 32 includes a first sub-bending portion 321 and a second sub-bending portion 322. The first sub-bending portion 321 is connected to the first fixing portion 31, and the second sub-bending portion 322 is connected to the second fixing portion 33. The first sub-bending portion 321 and the second sub-bending portion 322 are arranged opposite each other along a first plane, which is perpendicular to the thickness of the display device 10. The first plane is equidistant from the plane containing the first fixing portion 31 and the plane containing the second fixing portion 33. The maximum distance between the first sub-bending portion 321 and the first plane along the thickness of the display device 10 is a first distance A, and the maximum distance between the second sub-bending portion 322 and the first plane along the thickness of the display device 10 is a second distance B. The first distance A and the second distance B satisfy the following condition: 0.9 ≤ A / B ≤ 1.1. Optimally, the first distance A and the second distance B are equal, A / B = 1.

[0101] In the display device 10 provided in the embodiment of the present application, when the display device 10 is in a folded state, the first sub-bend portion 321 is connected to the first fixing portion 31, and the second sub-bend portion 322 is connected to the second fixing portion 33. The first sub-bend portion 321 and the second sub-bend portion 322 are arranged opposite each other along a first plane, the first plane being perpendicular to the thickness direction of the display device 10, and the distances between the first plane and the plane containing the first fixing portion 31 and the plane containing the second fixing portion 33 are equal. Furthermore, the maximum distance between the first sub-bend portion 321 and the first plane along the thickness direction of the display device 10 is a first distance A, and the maximum distance between the second sub-bend portion 322 and the first plane along the thickness direction of the display device 10 is a second distance B. The first distance A and the second distance B satisfy the following condition: 0.9≤A / B≤1.1. In this way, the first bending portion 32 and the second bending portion 34 are both bent to form a folded state. During the bending process, when one of the first bending portion 32 and the second bending portion 34 causes an extrusion effect on the other, since the maximum distance between the first sub-bending portion 321 and the first plane along the thickness direction of the display device 10 is the first distance A, and the maximum distance between the second sub-bending portion 322 and the first plane along the thickness direction of the display device 10 is the second distance B, the first distance A and the second distance B satisfy the following conditions: 0.9≤A / B≤1.1, thereby reducing the deviation of the bending shape of the first bending portion 32 caused by the squeezing of the first bending portion 32 by the second bending portion 34, and further reducing the asymmetry of the first bending portion 32 when the display device 10 is in the folded state, and further reducing the problem of film layer displacement and separation caused by the asymmetry of the first bending portion 32, and ultimately improving the service life of the display device 10.

[0102] It should be noted that Figure 1 X1Y1 in the figure is the first plane in this application; Figure 1 X2Y2 in the figure is the second plane in this application.

[0103] It should be noted that the middle frame 20 in the present application includes a first body 21, a second body 22 and a third body 23 arranged in sequence, and the display module 30 includes a first fixed portion 31, a first bending portion 32, a second fixed portion 33, a second bending portion 34 and a third fixed portion 35 arranged in sequence. At this time, the display device 10 of the present application is constituted as a three-fold product; of course, the middle frame 20 in the present application can also include a fourth body, a fifth body and an N-th body arranged in sequence, and the display module 30 can also include a third bending portion, a fourth fixed portion, a fourth bending portion, a fifth fixed portion, an N-th bending portion and an N-th fixed portion arranged in sequence. At this time, the display device 10 of the present application is constituted as an N-fold product.

[0104] It should be further explained that in a tri-fold product, if one of the two bending regions is bent while the other is in an extended state, no squeezing effect will occur between the two bending regions. Furthermore, in a multi-fold product, if one of the multiple bending regions is bent while the adjacent bending region is in an extended state, no squeezing effect will occur between the two adjacent bending regions.

[0105] It is understood that in a three-fold product, the folded state in this application is the state when the first bending portion 32 and the second bending portion 34 are both bent, at which point the first body 21, the second body 22, and the third body 23 are interlocked. In a multi-fold product, the folded state in this application is the state when two adjacent bending regions are both bent, at which point the folded state can be a state where all of the bodies are interlocked, or a state where some of the bodies are interlocked. That is, for a three-fold product, the folded state in this application is the state when the display device 10 is fully folded, while for a multi-fold product, the folded state in this application is the state when the display device 10 is fully folded or partially folded. For ease of explanation, this application takes a three-fold product as an example for illustrative purposes.

[0106] Specifically, when the display device 10 is in the folded state, the first bending portion 32 bends to interlock the first body 21 and the second body 22. The first bending portion 32 bends to form a first sub-bending portion 321 and a second sub-bending portion 322. The first sub-bending portion 321 is connected to the first fixing portion 31, and the second sub-bending portion 322 is connected to the second fixing portion 33. At this time, the first sub-bending portion 321 and the second sub-bending portion 322 are arranged opposite each other along a first plane, which is perpendicular to the thickness of the display device 10. The first plane is equidistant from the plane containing the first fixing portion 31 and the plane containing the second fixing portion 33. The maximum distance between the first sub-bending portion 321 and the first plane along the thickness of the display device 10 is a first distance A, and the maximum distance between the second sub-bending portion 322 and the first plane along the thickness of the display device 10 is a second distance B. The first distance A and the second distance B satisfy the following condition: 0.9 ≤ A / B ≤ 1.1.

[0107] Furthermore, since when the display device 10 is in the folded state, 0.9≤A / B≤1.1, the deviation of the bending shape of the first bending portion 32 caused by the second bending portion 34 squeezing the first bending portion 32 can be reduced, thereby reducing the asymmetry of the first bending portion 32 when the display device 10 is in the folded state, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first bending portion 32, and ultimately improving the service life of the display device 10.

[0108] At the same time, based on the above description, since the asymmetry of the first bending portion 32 can be reduced when the display device 10 is in a folded state, it can be ensured that when the display device 10 is in a folded state, the asymmetry of the film layer of the display device 10 can be reduced, thereby ensuring that the film layer of the display device 10 is evenly arranged, thereby improving the display uniformity of the display device 10.

[0109] In one embodiment, see Figure 1 、 Figure 2 and Figure 3 As shown, when the display device 10 is in the folded state, the second bending portion 34 includes a connected third sub-bending portion 341 and a fourth sub-bending portion 342. The third sub-bending portion 341 is connected to the third fixing portion 35, and the fourth sub-bending portion 342 is connected to the second fixing portion 33. The third sub-bending portion 341 and the fourth sub-bending portion 342 are arranged opposite each other along a second plane, which is perpendicular to the thickness direction of the display device 10. The second plane is equidistant from the plane containing the second fixing portion 33 and the plane containing the third fixing portion 35. The maximum distance between the third sub-bending portion 341 and the second plane along the thickness direction of the display device 10 is a third distance C, and the maximum distance between the fourth sub-bending portion 342 and the second plane along the thickness direction of the display device 10 is a fourth distance D. The third distance C and the fourth distance D satisfy the following condition: 0.9≤C / D≤1.1, preferably, C / D=1.

[0110] In this way, the first bending portion 32 and the second bending portion 34 are both bent to form a folded state. During the bending process of the first bending portion 32 and the second bending portion 34, when the first bending portion 32 squeezes the second bending portion 34, since the maximum distance between the third sub-bending portion 341 and the second plane along the thickness direction of the display device 10 is the third distance C, and the maximum distance between the fourth sub-bending portion 342 and the second plane along the thickness direction of the display device 10 is the fourth distance D, the third distance C and the fourth distance D satisfy the following conditions: 0.9≤C / D≤1.1, thereby reducing the deviation of the bending shape of the second bending portion 34 caused by the squeezing of the second bending portion 34 by the first bending portion 32, and further reducing the asymmetry of the second bending portion 34 when the display device 10 is in the folded state, and further reducing the problem of film layer displacement and separation caused by the asymmetry of the second bending portion 34, and ultimately improving the service life of the display device 10.

[0111] Similarly, since the asymmetry of the second bending portion 34 can be reduced when the display device 10 is in the folded state, the asymmetry of the film layer of the display device 10 can be reduced when the display device 10 is in the folded state, thereby ensuring that the film layer of the display device 10 is evenly arranged, thereby improving the display uniformity of the display device 10.

[0112] In one embodiment, the first distance A and the second distance B satisfy the following condition: A / B=1.

[0113] In this way, since A / B=1, that is, the first sub-bending portion 321 and the second sub-bending portion 322 are symmetrical along the first plane, that is, the first sub-bending portion 321 and the second sub-bending portion 322 are symmetrically arranged along the thickness direction of the display device 10, so that during the bending process of the first bending portion 32, the bending force of the first sub-bending portion 321 and the second sub-bending portion 322 can be uniform, thereby improving the bending effect of the first bending portion 32.

[0114] In one embodiment, the third distance C and the fourth distance D satisfy the following condition: C / D=1.

[0115] In this way, since C / D=1, the third sub-bending portion 341 and the fourth sub-bending portion 342 are symmetrical along the second plane, that is, the third sub-bending portion 341 and the fourth sub-bending portion 342 are symmetrically arranged along the thickness direction of the display device 10, so that during the bending process of the second bending portion 34, the bending force of the third sub-bending portion 341 and the fourth sub-bending portion 342 can be uniform, thereby improving the bending effect of the second bending portion 34.

[0116] In one embodiment, when the display device 10 is in the folded state, the first body 21 and the second body 22 are arranged opposite to each other along the thickness direction of the display device 10 , and the first fixing portion 31 and the second fixing portion 33 are both located between the first body 21 and the second body 22 .

[0117] In this way, since when the display device 10 is in the folded state, the first body 21 and the second body 22 are arranged relative to each other along the thickness direction of the display device 10, the first fixing portion 31 and the second fixing portion 33 are both located between the first body 21 and the second body 22, so that the first fixing portion 31, the second fixing portion 33 and the first bending portion 32 in the display module 30 can be protected by the first body 21 and the second body 22 of the middle frame 20, thereby protecting the display module 30 from impact, scratches and damage from the external environment, thereby improving the service life of the display module 30.

[0118] In one embodiment, when the display device 10 is in the folded state, the third body 23 is located on a side of the first body 21 facing away from the second body 22 , and the third fixing portion 35 is located between the first body 21 and the third body 23 .

[0119] In this way, when the display device 10 is in a folded state, the third body 23 is located on the side of the first body 21 away from the second body 22, and the third fixing portion 35 is located between the first body 21 and the third body 23. That is, when the display device 10 is in a folded state, it is a "G-type folding" state, so that the third fixing portion 35 and the second bending portion 34 in the display module 30 can be protected by the third body 23 of the middle frame 20, thereby protecting the display module 30 from impact, scratches and damage from the external environment, thereby improving the service life of the display module 30.

[0120] In one embodiment, see Figure 2 As shown, when the display device 10 is in the folded state, the third body 23 is located on a side of the second body 22 away from the first body 21 , and the third fixing portion 35 is located on a side of the third body 23 away from the second body 22 .

[0121] In this way, when the display device 10 is in the folded state, the third body 23 is located on the side of the second body 22 away from the first body 21, and the third fixing portion 35 is located on the side of the third body 23 away from the second body 22. That is, when the display device 10 is in the "Z-shaped folded" folded state, the third body 23 does not need to cover the second body 22 and the first body 21 during the folding process, but only needs to bend at the side of the first body 21 away from the second body 22, so that the display device 10 can be easily folded, greatly saving folding thickness and space.

[0122] In one embodiment, see Figure 3 and Figure 4 As shown, the first sub-bending portion 321 includes a first sub-portion 3211 and a second sub-portion 3212 connected to each other, the side of the first sub-portion 3211 away from the second sub-portion 3212 is connected to the second sub-bending portion 322, and the side of the second sub-portion 3212 away from the first sub-portion 3211 is connected to the first fixed portion 31; the protruding direction of the first sub-portion 3211 is opposite to the protruding direction of the second sub-portion 3212.

[0123] In this way, since the protruding direction of the first sub-section 3211 is opposite to that of the second sub-section 3212, the first sub-bending section 321 can use the second sub-section 3212 as a transition for the bending of the first sub-section 3211 during the bending process, thereby reducing the reverse force when the first sub-section 3211 is bent, avoiding damage to the first sub-section 3211 caused by excessive bending force during the bending process, and thus improving the bending effect of the first sub-bending section 321.

[0124] In one embodiment, the second sub-bending portion 322 includes a third sub-portion 3221 and a fourth sub-portion 3222 that are connected, the side of the third sub-portion 3221 away from the fourth sub-portion 3222 is connected to the first sub-portion 3211, and the side of the fourth sub-portion 3222 away from the third sub-portion 3221 is connected to the second fixed portion 33; the protruding direction of the third sub-portion 3221 is opposite to the protruding direction of the fourth sub-portion 3222.

[0125] As such, since the protruding direction of the third sub-portion 3221 is opposite to that of the fourth sub-portion 3222, i.e., the first sub-bending portion 321 and the second sub-bending portion 322 form a teardrop-shaped bend, the second sub-portion 3212 and the fourth sub-portion 3222 can respectively reduce the opposing forces acting on the first sub-portion 3211 and the third sub-portion 3221 when they bend, thereby reducing damage to the first bending portion 32 during the bending process and improving the bending effect of the first bending portion 32. The teardrop-shaped bending facilitates the bending of the first bending portion 32 and reduces the creases produced by the first bending portion 32 during the bending process, making the display device 10 smoother when unfolded. Furthermore, since the creases are reduced, the user can enjoy a clearer display and a better visual experience when using the display device 10.

[0126] In one embodiment, the first sub-portion 3211 and the third sub-portion 3221 are symmetrically arranged along the thickness direction of the display device 10 .

[0127] In this way, since the first sub-section 3211 and the third sub-section 3221 are symmetrically arranged along the thickness direction of the display device 10, during the bending process of the first bending section 32, the bending force of the first sub-section 3211 and the third sub-section 3221 can be uniform, thereby improving the bending effect of the first bending section 32.

[0128] In one embodiment, the second sub-portion 3212 and the fourth sub-portion 3222 are symmetrically arranged along the thickness direction of the display device 10 .

[0129] In this way, since the second sub-section 3212 and the fourth sub-section 3222 are symmetrically arranged along the thickness direction of the display device 10, during the bending process of the first bending section 32, the bending force of the second sub-section 3212 and the fourth sub-section 3222 can be uniform, thereby further improving the bending effect of the first bending section 32.

[0130] In one embodiment, see Figure 3 and Figure 5 As shown, the display device 10 further includes a first adhesive member 40 . The first adhesive member 40 is disposed between the first body 21 and the first sub-bending portion 321 , and the first adhesive member 40 is connected to the first body 21 and a portion of the first sub-bending portion 321 .

[0131] In this way, when the display device 10 is in a folded state, during the process of the second bending portion 34 bending and squeezing the first bending portion 32, the second bending portion 34 will press the second sub-bending portion 322 to deviate toward the second body 22. Since the first adhesive 40 is arranged between the first body 21 and the first sub-bending portion 321, and the first adhesive 40 is connected to the first body 21 and part of the first sub-bending portion 321, the first adhesive 40 can provide a pulling force toward the first body 21 for the first sub-bending portion 321, and then provide a pulling force toward the first body 21 for the second sub-bending portion 322, which can reduce the offset of the second sub-bending portion 322, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately can improve the service life of the display device 10.

[0132] In one embodiment, the first adhesive member 40 is connected to a portion of the first sub-portion 3211 .

[0133] In this way, since the first sub-portion 3211 is closer to the second sub-bending portion 322 than the second sub-portion 3212, when the second bending portion 34 presses the second sub-bending portion 322 to offset toward the second body 22, since the first sub-portion 3211 is closer to the second sub-bending portion 322 than the second sub-portion 3212, the first adhesive 40 is connected to part of the first sub-portion 3211, so that the effect of the pulling force provided by the first adhesive 40 to the second sub-bending portion 322 can be improved through the connection between the first adhesive 40 and the first sub-portion 3211, thereby further reducing the offset of the second sub-bending portion 322, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0134] In one embodiment, the bonding area between the first adhesive member 40 and the first sub-portion 3211 is M, the surface area of ​​the first sub-portion 3211 is N, and M and N satisfy the following condition: M≤(1 / 4)N.

[0135] In this way, since the area of ​​the bonding between the first adhesive 40 and the first sub-section 3211 is M, and the surface area of ​​the first sub-section 3211 is N, M and N satisfy the following conditions: M≤(1 / 4)N. Therefore, in the process of the second bending portion 34 bending and squeezing the first bending portion 32, the first adhesive 40 provides the second sub-bending portion 322 with a pulling force toward the first body 21. This can avoid the first adhesive 40 providing the second sub-bending portion 322 with excessive pulling force, which causes the second sub-bending portion 322 to shift toward the first body 21, thereby causing the second sub-bending portion 322 to shift in the opposite direction. This can improve the control of the first adhesive 40 over the offset effect of the second sub-bending portion 322.

[0136] In one embodiment, the first sub-portion 3211 includes a first bending section 3211a and a second bending section 3211b connected to each other, the side of the first bending section 3211a away from the second bending section 3211b is connected to the second sub-portion 322, and the side of the second bending section 3211b away from the first bending section 3211a is connected to the second sub-portion 3212; along the direction from the first bending section 3211a to the second bending section 3211b, the distance between the first bending section 3211a and the first plane along the thickness direction of the display device 10 gradually increases, and the distance between the second bending section 3211b and the first plane along the thickness direction of the display device 10 gradually decreases; along the thickness direction of the display device 10, the projection of the first adhesive 40 on the first plane is located within the projection of the second bending section 3211b on the first plane.

[0137] In this way, since the distance between the first bending section 3211a and the first plane along the thickness direction of the display device 10 gradually increases along the direction from the first bending section 3211a to the second bending section 3211b, the distance between the second bending section 3211b and the first plane along the thickness direction of the display device 10 gradually decreases; along the thickness direction of the display device 10, the projection of the first adhesive member 40 on the first plane is located within the projection of the second bending section 3211b on the first plane, that is, the first adhesive member 40 is located in the second sub-bending section 3211b. During the process of the first sub-bending portion 322 providing tension, it can be ensured that the direction of the tension provided by the first adhesive 40 to the second sub-bending portion 322 is opposite to the force direction of the second bending portion 34 pressing and driving the second sub-bending portion 322 to shift, thereby further improving the control of the first adhesive 40 on the offset effect of the second sub-bending portion 322, thereby further reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0138] In one embodiment, see Figure 3 and Figure 5 As shown, the display device 10 further includes a second adhesive member 50 . The second adhesive member 50 is disposed between the third body 23 and the third sub-bending portion 341 , and the second adhesive member 50 is connected to the third body 23 and a portion of the third sub-bending portion 341 .

[0139] In this way, when the display device 10 is in a folded state, during the process of the first bending portion 32 bending and squeezing the second bending portion 34, the first bending portion 32 will press the fourth sub-bending portion 342 to deviate toward the second body 22. Since the second adhesive 50 is arranged between the third body 23 and the third sub-bending portion 341, and the second adhesive 50 is connected to the third body 23 and part of the third sub-bending portion 341, the second adhesive 50 can provide a pulling force toward the third body 23 for the third sub-bending portion 341, and then provide a pulling force toward the third body 23 for the fourth sub-bending portion 342, which can reduce the offset of the fourth sub-bending portion 342, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the third sub-bending portion 341 and the fourth sub-bending portion 342, and ultimately can improve the service life of the display device 10.

[0140] In one embodiment, the bonding area between the second adhesive 50 and the third sub-bending portion 341 is P, the surface area of ​​the third sub-bending portion 341 is Q, and P and Q satisfy the following condition: Q≤(1 / 4)P.

[0141] In this way, since the area of ​​the bonding between the second adhesive 50 and the third sub-bending portion 341 is P, and the surface area of ​​the third sub-bending portion 341 is Q, P and Q satisfy the following conditions: Q≤(1 / 4)P, so that in the process of the first bending portion 32 bending and squeezing the second bending portion 34, the second adhesive 50 provides the fourth sub-bending portion 342 with a pulling force toward the third body 23, which can avoid the second adhesive 50 providing the fourth sub-bending portion 342 with excessive pulling force, thereby causing the fourth sub-bending portion 342 to shift toward the direction of the third body 23, thereby causing the fourth sub-bending portion 342 to shift in the opposite direction, thereby improving the control of the second adhesive 50 on the offset effect of the fourth sub-bending portion 342.

[0142] In one embodiment, the second adhesive member 50 is located on a side of the third sub-bending portion 341 close to the third fixing portion 35 .

[0143] In this way, since the second adhesive component 50 is located on the side of the third sub-bending portion 341 close to the third fixing portion 35, the connection between the second adhesive component 50 and the third sub-bending portion 341 can improve the effect of the pulling force provided by the second adhesive component 50 to the fourth sub-bending portion 342, thereby further reducing the offset of the fourth sub-bending portion 342, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the third sub-bending portion 341 and the fourth sub-bending portion 342, and ultimately improving the service life of the display device 10.

[0144] In one embodiment, see Figure 3 、 Figure 4 and Figure 5As shown, the middle frame 20 includes a first support member 24 and a second support member 25. The first support member 24 is disposed between the first body 21 and the first sub-bend portion 321; the second support member 25 is disposed between the second body 22 and the second sub-bend portion 322. Both the first support member 24 and the second support member 25 are inclined relative to the thickness direction of the display device 10, with the first support member 24 contacting the first sub-bend portion 321 and the second support member 25 contacting the second sub-bend portion 322. The angle between the extension direction of the first support member 24 and the first plane is θ1, and the angle between the extension direction of the second support member 25 and the first plane is θ2. θ1 and θ2 satisfy the following condition: θ2 < θ1.

[0145] In this way, during the bending process of the first bending portion 32, the first sub-bending portion 321 will be blocked by the first support member 24, and the second sub-bending portion 322 will be blocked by the second support member 25, so that the bending shape of the first sub-bending portion 321 and the second sub-bending portion 322 can be controlled by the first support member 24 and the second support member 25, thereby ensuring that the first sub-bending portion 321 and the second sub-bending portion 322 will not be excessively offset. In addition, since the second bending portion 34 will drive the second sub-bending portion 322 to move toward the second body 22, and the second bending portion 34 drives the first sub-bending portion 321 to move in the direction away from the second body 22, the second sub-bending portion 322 is more likely to be offset relative to the first sub-bending portion 321. Since the angle between the extension direction of the first support member 24 and the first plane is θ1, and the angle between the extension direction of the second support member 25 and the first plane is θ2, θ1 and θ2 satisfy the following condition: θ2<θ1, thereby ensuring that the offset of the first sub-bending portion 321 is greater than the offset of the second sub-bending portion 322, and further reducing the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322 after bending, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0146] In one embodiment, θ1 and θ2 satisfy the following condition: 0.5°≤θ1-θ2≤2.5°.

[0147] In this way, if the difference between θ1 and θ2 is too small, the second sub-bend portion 322 will be less blocked by the second support member 25, resulting in a serious offset of the second sub-bend portion 322. Conversely, if the difference between θ1 and θ2 is too large, the second sub-bend portion 322 will be too greatly affected by the bending of the first sub-bend portion 321, causing the second sub-bend portion 322 to offset toward the first sub-bend portion 321, resulting in the second sub-bend portion 322 offsetting in the opposite direction. Because θ1 and θ2 meet the following condition: 0.5°≤θ1-θ2≤2.5°, the bending effect of the first support member 24 and the second support member 25 on the first sub-bend portion 321 and the second sub-bend portion 322 can be improved, and the problem of film layer displacement and separation caused by the asymmetry of the first sub-bend portion 321 and the second sub-bend portion 322 can be reduced.

[0148] In one embodiment, θ1 satisfies the following condition: 8.5°≤θ1≤18°.

[0149] In this way, since 8.5°≤θ1≤18°, the blocking effect of the first support member 24 on the first sub-bending portion 321 can be ensured, thereby ensuring that the first support member 24 controls the shape of the first sub-bending portion 321, and further ensuring that the bending shape of the first sub-bending portion 321 will not be excessively offset.

[0150] In one embodiment, θ2 satisfies the following condition: 8°≤θ2≤17.5°.

[0151] In this way, since 8°≤θ2≤17.5°, the blocking effect of the second support member 25 on the second sub-bending portion 322 can be ensured, thereby ensuring that the second support member 25 controls the shape of the second sub-bending portion 322, and further ensuring that the bending shape of the second sub-bending portion 322 will not be excessively deviated.

[0152] In one embodiment, the first sub-portion 3211 includes a first bending section 3211a and a second bending section 3211b connected to each other, the side of the first bending section 3211a away from the second bending section 3211b being connected to the second sub-portion 322, and the side of the second bending section 3211b away from the first bending section 3211a being connected to the second sub-portion 3212; along the direction from the first bending section 3211a to the second bending section 3211b, the distance between the first bending section 3211a and the first plane along the thickness direction of the display device 10 gradually increases, and the distance between the second bending section 3211b and the first plane along the thickness direction of the display device 10 gradually decreases; along the thickness direction of the display device 10, the projection of the first support member 24 on the first plane is located within the projection of the second bending section 3211b on the first plane.

[0153] In this way, since the distance between the first bending segment 3211a and the first plane along the thickness direction of the display device 10 gradually increases, and the distance between the second bending segment 3211b and the first plane along the thickness direction of the display device 10 gradually decreases along the direction from the first bending segment 3211a to the second bending segment 3211b; along the thickness direction of the display device 10, the projection of the first support member 24 on the first plane is located within the projection of the second bending segment 3211b on the first plane, that is, in the process of providing morphological control for the first sub-bending portion 321, the first support member 24 can ensure that the direction of the blocking force provided by the first support member 24 to the first sub-bending portion 321 is opposite to the force direction of the second bending portion 34 that compresses and drives the first sub-bending portion 321 to deflect, thereby further improving the control of the first support member 24 on the deflection effect of the first sub-bending portion 321, thereby further reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0154] In one embodiment, the third sub-section 3221 includes a third bending section 3221a and a fourth bending section 3221b that are connected, the side of the third bending section 3221a away from the fourth bending section 3221b is connected to the first bending section 3211a, and the side of the fourth bending section 3221b away from the third bending section 3221a is connected to the fourth sub-section 3222; along the direction from the third bending section 3221a to the fourth bending section 3221b, the distance between the third bending section 3221a and the first plane along the thickness direction of the display device 10 gradually increases, and the distance between the fourth bending section 3221b and the first plane along the thickness direction of the display device 10 gradually decreases; along the thickness direction of the display device 10, the projection of the second support member 25 on the first plane is located within the projection of the fourth bending section 3221b on the first plane.

[0155] In this way, since the distance between the third bending segment 3221a and the first plane along the thickness direction of the display device 10 gradually increases, and the distance between the fourth bending segment 3221b and the first plane along the thickness direction of the display device 10 gradually decreases along the direction of the thickness of the display device 10; along the thickness direction of the display device 10, the projection of the second support member 25 on the first plane is located within the projection of the fourth bending segment 3221b on the first plane, that is, in the process of the second support member 25 providing morphological control for the second sub-bending portion 322, it can be ensured that the direction of the blocking force provided by the second support member 25 to the second sub-bending portion 322 is opposite to the force direction of the second bending portion 34 that compresses and drives the second sub-bending portion 322 to deflect, thereby further improving the control of the second support member 25 on the deflection effect of the second sub-bending portion 322, thereby further reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0156] In one embodiment, along the thickness direction of the display device 10 , a projection of the first support member 24 on the first plane coincides with a projection of the second support member 25 on the first plane.

[0157] In this way, since the projection of the first support member 24 on the first plane coincides with the projection of the second support member 25 on the first plane along the thickness direction of the display device 10, during the bending process of the first bending portion 32, the blocking force provided by the first support member 24 and the second support member 25 to the first sub-bending portion 321 and the second sub-bending portion 322 can be uniform, thereby improving the bending effect of the first bending portion 32.

[0158] In one embodiment, the display module 30 includes a supporting layer and a display panel stacked in sequence in a direction away from the middle frame 20; the elastic modulus of at least part of the supporting layer located in the first sub-bending portion 321 is greater than the elastic modulus of at least part of the supporting layer located in the second sub-bending portion 322.

[0159] In this way, when the display device 10 is in a folded state, during the process of the second bending portion 34 bending and squeezing the first bending portion 32, the second sub-bending portion 322 is closer to the second bending portion 34 relative to the first sub-bending portion 321, thereby causing the force applied to the first sub-bending portion 321 during the bending process to be greater than the force applied to the second sub-bending portion 322 during the bending process. Since the elastic modulus of at least part of the supporting layer located in the first sub-bending portion 321 is greater than the elastic modulus of at least part of the supporting layer located in the second sub-bending portion 322, the first sub-bending portion 321 can have greater rigidity relative to the second sub-bending portion 322, thereby providing stronger support performance for the first sub-bending portion 321 during the bending process.

[0160] In one embodiment, see Figure 6 As shown, the first sub-bending portion 321 includes a first opening portion 3213, and the first opening portion 3213 is provided with a plurality of first openings; the second sub-bending portion 322 includes a second opening portion 3223, and the second opening portion 3223 is provided with a plurality of second openings; one side of the first opening portion 3213 is connected to the second sub-bending portion 322, and one side of the second opening portion 3223 is connected to the first opening portion 3213; the elastic modulus of the first opening portion 3213 is greater than the elastic modulus of the second opening portion 3223.

[0161] In this way, since the elastic modulus of the first opening portion 3213 is greater than the elastic modulus of the second opening portion 3223, on the one hand, the first opening portion 3213 can have greater rigidity relative to the second opening portion 3223, thereby providing stronger support performance for the first opening portion 3213 during the bending process; on the other hand, the first opening portion 3213 and the second opening portion 3223 can be used to improve the maintenance of the bending shape of the first sub-bending portion 321 and the second sub-bending portion 322, thereby reducing the offset of the first sub-bending portion 321 and the second sub-bending portion 322, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0162] In one embodiment, the sum of the areas of all the first openings in the first opening portion 3213 per unit area is smaller than the sum of the areas of all the second openings in the second opening portion 3223 per unit area.

[0163] In this way, since the sum of the areas of all the first openings in the first opening portion 3213 within a unit area is smaller than the sum of the areas of all the second openings in the second opening portion 3223 within a unit area, the offset of the second sub-bend portion 322 relative to the first sub-bend portion 321 can be further reduced.

[0164] In one embodiment, the number of the first openings is less than the number of the second openings.

[0165] In this way, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the first sub-bending portion 321 and the second sub-bending portion 322.

[0166] In one embodiment, the area of ​​the first opening is the same as the area of ​​the second opening.

[0167] In this way, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the first sub-bending portion 321 and the second sub-bending portion 322.

[0168] In one embodiment, the first sub-bending portion 321 also includes a first non-opening portion 3214, one side of the first non-opening portion 3214 is connected to the side of the first opening portion 3213 away from the second opening portion 3223, and the other side of the first non-opening portion 3214 is connected to the first fixing portion 31; the multiple first openings do not overlap with the first non-opening portion 3214.

[0169] In this way, since the multiple first openings do not overlap with the first non-opening portion 3214, the rigidity of the first non-opening portion 3214 is greater than the rigidity of the first opening portion 3213. Therefore, during the bending process of the first sub-bending portion 321, the first non-opening portion 3214 can provide sufficient support for the bending of the first sub-bending portion 321, thereby ensuring the normal bending of the first sub-bending portion 321.

[0170] In one embodiment, the second sub-bending portion 322 also includes a second non-opening portion 3224, one side of the second opening portion 3223 is connected to the first opening portion 3213, one side of the second non-opening portion 3224 is connected to the side of the second opening portion 3223 away from the first opening portion 3213, and the other side of the second non-opening portion 3224 is connected to the second fixing portion 33; the multiple second openings do not overlap with the second non-opening portion 3224.

[0171] In this way, since the multiple second openings do not overlap with the second non-opening portion 3224, the rigidity of the second non-opening portion 3224 is greater than the rigidity of the second opening portion 3223. Therefore, during the bending process of the second sub-bending portion 322, the second non-opening portion 3224 can provide sufficient support for the bending of the second sub-bending portion 322, thereby ensuring the normal bending of the second sub-bending portion 322.

[0172] In one embodiment, the elastic modulus of at least a portion of the support layer located in the third sub-bending portion 341 is greater than the elastic modulus of at least a portion of the support layer located in the fourth sub-bending portion 342 .

[0173] In this way, when the display device 10 is in a folded state, during the process of the first bending portion 32 bending and squeezing the second bending portion 34, the fourth sub-bending portion 342 is closer to the first bending portion 32 relative to the third sub-bending portion 341, thereby causing the force applied to the third sub-bending portion 341 during the bending process to be greater than the force applied to the fourth sub-bending portion 342 during the bending process. Since the elastic modulus of at least part of the supporting layer located in the third sub-bending portion 341 is greater than the elastic modulus of at least part of the supporting layer located in the fourth sub-bending portion 342, the third sub-bending portion 341 can have greater rigidity relative to the fourth sub-bending portion 342, thereby providing stronger support performance for the third sub-bending portion 341 during the bending process.

[0174] In one embodiment, the third sub-bend portion 341 includes a third opening portion 3411, which is provided with a plurality of third openings; the fourth sub-bend portion 342 includes a fourth opening portion 3421, which is provided with a plurality of fourth openings; one side of the third opening portion 3411 is connected to the fourth sub-bend portion 342, and one side of the fourth opening portion 3421 is connected to the third opening portion 3411; the elastic modulus of the third opening portion 3411 is greater than the elastic modulus of the fourth opening portion 3421.

[0175] In this way, since the elastic modulus of the third opening portion 3411 is greater than the elastic modulus of the fourth opening portion 3421, on the one hand, the third opening portion 3411 can have greater rigidity than the fourth opening portion 3421, thereby providing stronger support performance for the third opening portion 3411 during the bending process; on the other hand, the third opening portion 3411 and the fourth opening portion 3421 can be used to improve the maintenance of the bending shape of the third sub-bending portion 341 and the fourth sub-bending portion 342, thereby reducing the offset of the third sub-bending portion 341 and the fourth sub-bending portion 342, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the third sub-bending portion 341 and the fourth sub-bending portion 342, and ultimately improving the service life of the display device 10.

[0176] In one embodiment, the sum of the areas of all the third openings in the third opening portion 3411 within a unit area is smaller than the sum of the areas of all the fourth openings in the fourth opening portion 3421 within a unit area.

[0177] In this way, since the sum of the areas of all third openings in the third opening portion 3411 within a unit area is smaller than the sum of the areas of all fourth openings in the fourth opening portion 3421 within a unit area, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be further reduced.

[0178] In one embodiment, the number of the third openings is less than the number of the fourth openings.

[0179] In this way, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the third sub-bending portion 341 and the fourth sub-bending portion 342.

[0180] In one embodiment, the area of ​​the third opening is the same as the area of ​​the fourth opening.

[0181] In this way, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the third sub-bending portion 341 and the fourth sub-bending portion 342.

[0182] In one embodiment, the third sub-bending portion 341 also includes a third non-opening portion 3412, one side of the third non-opening portion 3412 is connected to the side of the third opening portion 3411 away from the fourth opening portion 3421, and the other side of the third non-opening portion 3412 is connected to the third fixing portion 35; the multiple third openings do not overlap with the third non-opening portion 3412.

[0183] In this way, since the multiple third openings do not overlap with the third non-opening portion 3412, the rigidity of the third non-opening portion 3412 is greater than the rigidity of the third opening portion 3411. Therefore, during the bending process of the third sub-bending portion 341, the third non-opening portion 3412 can provide sufficient support for the bending of the third sub-bending portion 341, thereby ensuring the normal bending of the third sub-bending portion 341.

[0184] In one embodiment, the fourth sub-bending portion 342 also includes a fourth non-opening portion 3422, one side of the fourth non-opening portion 3422 is connected to the side of the fourth opening portion 3421 away from the third opening portion 3411, and the other side of the fourth non-opening portion 3422 is connected to the second fixing portion 33; the multiple fourth openings do not overlap with the fourth non-opening portion 3422.

[0185] In this way, since the multiple fourth openings do not overlap with the fourth non-opening portion 3422, the rigidity of the fourth non-opening portion 3422 is greater than the rigidity of the fourth opening portion 3421. Therefore, during the bending process of the fourth sub-bending portion 342, the fourth non-opening portion 3422 can provide sufficient support for the bending of the fourth sub-bending portion 342, thereby ensuring the normal bending of the fourth sub-bending portion 342.

[0186] In one embodiment, see Figure 6 and Figure 7 As shown, along the direction from the first sub-bend portion 321 to the second sub-bend portion 322 , the distance between adjacent first openings is L1 , and the distance between adjacent second openings is L2 , and L1 and L2 satisfy the following condition: L1 > L2 .

[0187] In this way, since L1>L2, on the one hand, the first sub-bending portion 321 can have greater rigidity relative to the second sub-bending portion 322, thereby providing stronger support performance for the first sub-bending portion 321 during the bending process; on the other hand, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0188] In one embodiment, L1 and L2 satisfy the following condition: 1.05≤L1 / L2≤1.15.

[0189] In this way, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be further reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the first sub-bending portion 321 and the second sub-bending portion 322.

[0190] In one embodiment, L2 satisfies the following condition: 0.4 mm ≤ L2 ≤ 1.5 mm.

[0191] In this way, it is possible to avoid the situation where the size of L2 is too small, which would result in the distance between adjacent second openings being too close, causing cracks to form between the multiple second openings during the bending process of the second sub-bend portion 322, resulting in the second sub-bend portion 322 breaking. At the same time, it is possible to avoid the situation where the size of L2 is too large, which would result in the second sub-bend portion 322 still having a large offset relative to the first sub-bend portion 321. Furthermore, since 0.4mm≤L2≤1.5mm, while ensuring the bending stability of the second sub-bend portion 322, the problem of film layer displacement and separation caused by the asymmetry between the first sub-bend portion 321 and the second sub-bend portion 322 can be reduced, which can further improve the service life of the display device 10.

[0192] In one embodiment, along the direction intersecting the direction from the first sub-bend portion 321 to the second sub-bend portion 322, the distance between adjacent first openings is L3, and the distance between adjacent second openings is L4, and L3 and L4 satisfy the following condition: L3>L4.

[0193] In this way, since L3>L4, on the one hand, the first sub-bending portion 321 can have greater rigidity relative to the second sub-bending portion 322, thereby providing stronger support performance for the first sub-bending portion 321 during the bending process; on the other hand, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the first sub-bending portion 321 and the second sub-bending portion 322, and ultimately improving the service life of the display device 10.

[0194] In one embodiment, L3 and L4 satisfy the following condition: 1.05≤L3 / L4≤1.15.

[0195] In this way, the offset of the second sub-bending portion 322 relative to the first sub-bending portion 321 can be further reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the first sub-bending portion 321 and the second sub-bending portion 322.

[0196] In one embodiment, L4 satisfies the following condition: 0.4 mm ≤ L4 ≤ 1.5 mm.

[0197] In this way, it is possible to avoid the situation where L4 is too small, which would cause the distance between adjacent second openings to be too close, thereby causing cracks in the second sub-bend portion 322 between the multiple second openings during the bending process, causing the second sub-bend portion 322 to break. At the same time, it is possible to avoid the situation where L4 is too large, which would cause the second sub-bend portion 322 to still have a large offset relative to the first sub-bend portion 321. Furthermore, because 0.4mm≤L4≤1.5mm, while ensuring the bending stability of the second sub-bend portion 322, the problem of film layer displacement and separation caused by the asymmetry between the first sub-bend portion 321 and the second sub-bend portion 322 can be reduced, which can further improve the service life of the display device 10.

[0198] In one embodiment, see Figure 6 and Figure 8 As shown, along the direction from the third sub-bend portion 341 to the fourth sub-bend portion 342, the distance between adjacent third openings is L5, and the distance between adjacent fourth openings is L6, and L5 and L6 satisfy the following condition: L5>L6.

[0199] In this way, since L5>L6, on the one hand, the third sub-bending portion 341 can have greater rigidity relative to the fourth sub-bending portion 342, thereby providing stronger support performance for the third sub-bending portion 341 during the bending process; on the other hand, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the third sub-bending portion 341 and the fourth sub-bending portion 342, and ultimately improving the service life of the display device 10.

[0200] In one embodiment, L5 and L6 satisfy the following condition: 1.05≤L5 / L6≤1.15.

[0201] In this way, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be further reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the third sub-bending portion 341 and the fourth sub-bending portion 342.

[0202] In one embodiment, L6 satisfies the following condition: 0.4 mm ≤ L6 ≤ 1.5 mm.

[0203] In this way, it is possible to avoid the situation where the size of L6 is too small, which would cause the distance between adjacent fourth openings to be too close, thereby causing cracks to form between the plurality of fourth openings during the bending process of the fourth sub-bend portion 342, and causing the fourth sub-bend portion 342 to break. At the same time, it is possible to avoid the situation where the size of L6 is too large, which would cause the fourth sub-bend portion 342 to still have a large offset relative to the third sub-bend portion 341. Furthermore, since 0.4mm≤L6≤1.5mm, it is possible to ensure the bending stability of the fourth sub-bend portion 342 while reducing the problem of film layer displacement and separation caused by the asymmetry between the third sub-bend portion 341 and the fourth sub-bend portion 342, thereby further improving the service life of the display device 10.

[0204] In one embodiment, along the direction intersecting with the direction from the third sub-bend portion 341 to the fourth sub-bend portion 342, the distance between adjacent third openings is L7, and the distance between adjacent fourth openings is L8, and L7 and L8 satisfy the following condition: L7>L8.

[0205] In this way, since L7>L8, on the one hand, the third sub-bending portion 341 can have greater rigidity relative to the fourth sub-bending portion 342, thereby providing stronger support performance for the third sub-bending portion 341 during the bending process; on the other hand, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry of the third sub-bending portion 341 and the fourth sub-bending portion 342, and ultimately improving the service life of the display device 10.

[0206] In one embodiment, L7 and L8 satisfy the following condition: 1.05≤L7 / L8≤1.15.

[0207] In this way, the offset of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 can be further reduced, thereby reducing the problem of film layer displacement and separation caused by the asymmetry between the third sub-bending portion 341 and the fourth sub-bending portion 342.

[0208] In one embodiment, L8 satisfies the following condition: 0.4 mm ≤ L8 ≤ 1.5 mm.

[0209] In this way, it is possible to avoid the situation where the size of L8 is too small, which would cause the distance between adjacent fourth openings to be too close, thereby causing cracks to form between the plurality of fourth openings during the bending process of the fourth sub-bend portion 342, and thus causing the fourth sub-bend portion 342 to break. At the same time, it is possible to avoid the situation where the size of L8 is too large, which would cause the fourth sub-bend portion 342 to still have a large offset relative to the third sub-bend portion 341. Furthermore, since 0.4mm≤L8≤1.5mm, the problem of film layer displacement and separation caused by the asymmetry between the third sub-bend portion 341 and the fourth sub-bend portion 342 can be reduced while ensuring the bending stability of the fourth sub-bend portion 342, thereby further improving the service life of the display device 10.

[0210] In one embodiment, the distances between adjacent first openings are equal, the distances between adjacent second openings are equal, the distances between adjacent third openings are equal, and the distances between adjacent fourth openings are equal.

[0211] In this way, during the bending process of the first bending portion 32 and the second bending portion 34, it can be ensured that the first sub-bending portion 321, the second sub-bending portion 322, the third sub-bending portion 341 and the fourth sub-bending portion 342 are all subjected to uniform force, thereby improving the bending effect of the first bending portion 32 and the second bending portion 34.

[0212] In one embodiment, see Figure 6 As shown, along the direction from the first sub-bend portion 321 to the second sub-bend portion 322, the length of the first opening portion 3213 is L 11 , the length of the second opening portion 3223 is L 12 , L 11 and L 12 Meet the following conditions: (0.75) L 12 <L 11 <L 12 .

[0213] Thus, since (0.75)L 12 <L 11 <L 12 , which can avoid excessive deviation of the bending shape of the second sub-bending portion 322 relative to the first sub-bending portion 321 when bending, thereby reducing the problem of film layer displacement and separation, and ultimately improving the service life of the display device 10.

[0214] In one embodiment, along the direction from the third sub-bend portion 341 to the fourth sub-bend portion 342, the length of the third opening portion 3411 is L 13 , the length of the fourth opening portion 3421 is L 14 , L 13 and L 14Meet the following conditions: (0.75) L 14 <L 13 <L 14 .

[0215] Thus, since (0.75)L 14 <L 13 <L 14 , which can avoid excessive deviation of the bending shape of the fourth sub-bending portion 342 relative to the third sub-bending portion 341 when bending, thereby reducing the problem of film layer displacement and separation, and ultimately improving the service life of the display device 10.

[0216] Second, see Figure 9 As shown, an embodiment of the present application provides an electronic device 100, including the display device 10 in the first aspect.

[0217] The electronic device 100 provided in the embodiment of the present application, when the display device 10 is in the folded state, is configured such that the first sub-bend portion 321 is connected to the first fixing portion 31, and the second sub-bend portion 322 is connected to the second fixing portion 33. The first sub-bend portion 321 and the second sub-bend portion 322 are arranged opposite each other along a first plane, the first plane being perpendicular to the thickness direction of the display device 10, and the distances between the first plane and the plane where the first fixing portion 31 is located and the plane where the second fixing portion 33 is located are equal. Furthermore, the maximum distance between the first sub-bend portion 321 and the first plane along the thickness direction of the display device 10 is a first distance A, and the maximum distance between the second sub-bend portion 322 and the first plane along the thickness direction of the display device 10 is a second distance B. The first distance A and the second distance B satisfy the following condition: 0.9≤A / B≤1.1. In this way, the first bending portion 32 and the second bending portion 34 are both bent to form a folded state. During the bending process, when one of the first bending portion 32 and the second bending portion 34 causes an extrusion effect on the other, since the maximum distance between the first sub-bending portion 321 and the first plane along the thickness direction of the display device 10 is the first distance A, and the maximum distance between the second sub-bending portion 322 and the first plane along the thickness direction of the display device 10 is the second distance B, the first distance A and the second distance B satisfy the following conditions: 0.9≤A / B≤1.1, thereby reducing the offset of the bending shape of the first bending portion 32 caused by the squeezing of the first bending portion 32 by the second bending portion 34, and further reducing the asymmetry of the first bending portion 32 when the display device 10 is in the folded state, and further reducing the problem of film layer displacement and separation caused by the asymmetry of the first bending portion 32, and ultimately improving the service life of the electronic device 100.

[0218] It will be appreciated that the electronic device 100 in the embodiment of the present application may be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (e.g., an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (e.g., a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a front projector, etc.

[0219] It should be understood that in the embodiments of the present application, at least part of the steps in the accompanying drawings may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The order of execution of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0220] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0221] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0222] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A display device, characterized in that: include: A middle frame, comprising a first body, a second body, and a third body arranged in sequence, wherein two ends of the second body are connected to the first body and the third body respectively; a display module, held on the middle frame, and comprising a first fixing portion, a first bending portion, a second fixing portion, a second bending portion, and a third fixing portion arranged in sequence, wherein the first fixing portion is held on the first body, the second fixing portion is held on the second body, and the third fixing portion is held on the third body; When the display device is in a folded state, the first bending portion includes a first sub-bending portion and a second sub-bending portion that are connected to each other, the first sub-bending portion being connected to the first fixing portion, and the second sub-bending portion being connected to the second fixing portion; the first sub-bending portion and the second sub-bending portion being arranged opposite to each other along a first plane, the first plane being perpendicular to a thickness direction of the display device, and the first plane being equidistant from the plane where the first fixing portion is located and the plane where the second fixing portion is located; The maximum distance between the first sub-bend portion and the first plane along the thickness direction of the display device is a first distance A, and the maximum distance between the second sub-bend portion and the first plane along the thickness direction of the display device is a second distance B, and the first distance A and the second distance B meet the following condition: 0.9≤A / B≤1.1; When the display device is in the folded state, the second bending portion includes a third sub-bending portion and a fourth sub-bending portion that are connected to each other, the third sub-bending portion is connected to the third fixing portion, and the fourth sub-bending portion is connected to the second fixing portion; the third sub-bending portion and the fourth sub-bending portion are arranged opposite to each other along a second plane, the second plane is perpendicular to the thickness direction of the display device, and the second plane is equidistant from the plane where the second fixing portion is located and the plane where the third fixing portion is located; The maximum distance between the third sub-bend portion and the second plane along the thickness direction of the display device is a third distance C, and the maximum distance between the fourth sub-bend portion and the second plane along the thickness direction of the display device is a fourth distance D, wherein the third distance C and the fourth distance D satisfy the following condition: 0.9≤C / D≤1.1; When the display device is in the folded state, the first body and the second body are arranged opposite to each other along the thickness direction of the display device, and the first fixing portion and the second fixing portion are both located between the first body and the second body; When the display device is in the folded state, the third body is located on a side of the first body facing away from the second body, and the third fixing portion is located between the first body and the third body; or, when the display device is in the folded state, the third body is located on a side of the second body facing away from the first body, and the third fixing portion is located on a side of the third body facing away from the second body; The first sub-bend portion includes a first sub-portion and a second sub-portion connected to each other, wherein a side of the first sub-portion away from the second sub-portion is connected to the second sub-bend portion, and a side of the second sub-portion away from the first sub-portion is connected to the first fixing portion; a protruding direction of the first sub-portion is opposite to a protruding direction of the second sub-portion; The second sub-bending portion includes a third sub-portion and a fourth sub-portion connected to each other, wherein a side of the third sub-portion away from the fourth sub-portion is connected to the first sub-portion, and a side of the fourth sub-portion away from the third sub-portion is connected to the second fixing portion; a protruding direction of the third sub-portion is opposite to a protruding direction of the fourth sub-portion; The first sub-section and the third sub-section are symmetrically arranged along the thickness direction of the display device; The second sub-section and the fourth sub-section are symmetrically arranged along the thickness direction of the display device; The middle frame includes: a first support member, disposed between the first body and the first sub-bending portion; a second supporting member, disposed between the second body and the second sub-bending portion; The first support member and the second support member are both inclined with respect to the thickness direction of the display device, the first support member contacts the first sub-bending portion, and the second support member contacts the second sub-bending portion; an angle θ1 is formed between an extension direction of the first support member and the first plane, and an angle θ2 is formed between an extension direction of the second support member and the first plane, wherein θ1 and θ2 satisfy the following condition: θ2<θ1; The θ1 and the θ2 satisfy the following condition: 0.5°≤θ1-θ2≤2.5°; The θ1 satisfies the following conditions: 8.5°≤θ1≤18°; The θ2 satisfies the following conditions: 8°≤θ2≤17.5°; The first sub-portion includes a first bending section and a second bending section connected to each other, wherein a side of the first bending section away from the second bending section is connected to the second sub-bending section, and a side of the second bending section away from the first bending section is connected to the second sub-portion; along the direction from the first bending section to the second bending section, the distance between the first bending section and the first plane along the thickness direction of the display device gradually increases, and the distance between the second bending section and the first plane along the thickness direction of the display device gradually decreases; Along the thickness direction of the display device, the projection of the first support member on the first plane is located within the projection of the second bent section on the first plane; The third sub-section includes a third bent section and a fourth bent section that are connected to each other, wherein a side of the third bent section away from the fourth bent section is connected to the first bent section, and a side of the fourth bent section away from the third bent section is connected to the fourth sub-section; along the direction from the third bent section to the fourth bent section, a distance between the third bent section and the first plane along the thickness direction of the display device gradually increases, and a distance between the fourth bent section and the first plane along the thickness direction of the display device gradually decreases; Along the thickness direction of the display device, the projection of the second support member on the first plane is located within the projection of the fourth bending section on the first plane; Along the thickness direction of the display device, a projection of the first support member on the first plane coincides with a projection of the second support member on the first plane.

2. The display device according to claim 1, wherein The first distance A and the second distance B satisfy the following condition: A / B=1.

3. The display device according to claim 1, wherein The third distance C and the fourth distance D satisfy the following condition: C / D=1.

4. The display device according to claim 1, wherein The display device further includes: The first adhesive component is provided between the first body and the first sub-bending portion, and the first adhesive component is connected to the first body and a portion of the first sub-bending portion.

5. The display device according to claim 4, wherein: The first adhesive component is connected to a portion of the first sub-section.

6. The display device according to claim 5, wherein: The area of ​​the first adhesive member bonded to the first sub-section is M, the surface area of ​​the first sub-section is N, and the M and N satisfy the following condition: M≤(1 / 4)N.

7. The display device according to claim 5, wherein: The first sub-portion includes a first bending section and a second bending section connected to each other, wherein a side of the first bending section away from the second bending section is connected to the second sub-bending section, and a side of the second bending section away from the first bending section is connected to the second sub-portion; along the direction from the first bending section to the second bending section, the distance between the first bending section and the first plane along the thickness direction of the display device gradually increases, and the distance between the second bending section and the first plane along the thickness direction of the display device gradually decreases; Along the thickness direction of the display device, a projection of the first adhesive member on the first plane is located within a projection of the second bent section on the first plane.

8. The display device according to claim 1, wherein The display device further includes: The second adhesive component is provided between the third body and the third sub-bending portion, and the second adhesive component is connected to the third body and a portion of the third sub-bending portion.

9. The display device according to claim 8, wherein The area of ​​the second adhesive bonding to the third sub-bending portion is P, the surface area of ​​the third sub-bending portion is Q, and P and Q satisfy the following condition: Q≤(1 / 4)P.

10. The display device according to claim 8, wherein The second adhesive component is located on a side of the third sub-bending portion close to the third fixing portion.

11. The display device according to any one of claims 1 to 10, characterized in that: The display module includes a support layer and a display panel stacked in sequence in a direction away from the middle frame; The elastic modulus of at least a portion of the support layer located at the first sub-bending portion is greater than the elastic modulus of at least a portion of the support layer located at the second sub-bending portion.

12. The display device according to claim 11, wherein The first sub-bending portion includes a first opening portion, which is provided with a plurality of first openings; the second sub-bending portion includes a second opening portion, which is provided with a plurality of second openings; One side of the first opening portion is connected to the second sub-bending portion, and one side of the second opening portion is connected to the first opening portion; The elastic modulus of the first opening portion is greater than the elastic modulus of the second opening portion.

13. The display device according to claim 12, wherein: The sum of the areas of all the first openings in the first opening portion within a unit area is smaller than the sum of the areas of all the second openings in the second opening portion within a unit area.

14. The display device according to claim 12, wherein: The number of the first openings is smaller than the number of the second openings.

15. The display device according to claim 12, wherein: The area of ​​the first opening is the same as the area of ​​the second opening.

16. The display device according to claim 12, wherein: The first sub-bending portion also includes a first non-opening portion, one side of the first non-opening portion is connected to the side of the first opening portion away from the second opening portion, and the other side of the first non-opening portion is connected to the first fixing portion; the multiple first openings do not overlap with the first non-opening portion.

17. The display device according to claim 16, wherein: The second sub-bending portion also includes a second non-opening portion, one side of the second opening portion is connected to the first opening portion, one side of the second non-opening portion is connected to the side of the second opening portion away from the first opening portion, and the other side of the second non-opening portion is connected to the second fixing portion; the multiple second openings do not overlap with the second non-opening portion.

18. The display device according to claim 17, wherein: The elastic modulus of at least a portion of the support layer located at the third sub-bending portion is greater than the elastic modulus of at least a portion of the support layer located at the fourth sub-bending portion.

19. The display device according to claim 18, wherein The third sub-bend portion includes a third opening portion, and the third opening portion is provided with a plurality of third openings; the fourth sub-bend portion includes a fourth opening portion, and the fourth opening portion is provided with a plurality of fourth openings; One side of the third opening portion is connected to the fourth sub-bending portion, and one side of the fourth opening portion is connected to the third opening portion; The elastic modulus of the third opening portion is greater than the elastic modulus of the fourth opening portion.

20. The display device according to claim 19, wherein The sum of the areas of all the third openings in the third opening portion within a unit area is smaller than the sum of the areas of all the fourth openings in the fourth opening portion within a unit area.

21. The display device according to claim 19, wherein The number of the third openings is smaller than the number of the fourth openings.

22. The display device according to claim 19, wherein The area of ​​the third opening is the same as the area of ​​the fourth opening.

23. The display device according to claim 19, wherein The third sub-bending portion also includes a third non-opening portion, one side of the third non-opening portion is connected to the side of the third opening portion away from the fourth opening portion, and the other side of the third non-opening portion is connected to the third fixing portion; the multiple third openings do not overlap with the third non-opening portion.

24. The display device according to claim 23, wherein: The fourth sub-bending portion also includes a fourth non-opening portion, one side of the fourth non-opening portion is connected to the side of the fourth opening portion away from the third opening portion, and the other side of the fourth non-opening portion is connected to the second fixing portion; the multiple fourth openings do not overlap with the fourth non-opening portion.

25. The display device according to claim 24, wherein: Along the direction from the first sub-bending portion to the second sub-bending portion, the distance between adjacent first openings is L1, and the distance between adjacent second openings is L2, and L1 and L2 satisfy the following condition: L1>L2.

26. The display device according to claim 25, wherein: The L1 and the L2 satisfy the following condition: 1.05≤L1 / L2≤1.

15.

27. The display device according to claim 26, wherein: The L2 satisfies the following condition: 0.4 mm ≤ L2 ≤ 1.5 mm.

28. The display device according to claim 25, wherein Along the direction intersecting with the direction from the first sub-bending portion to the second sub-bending portion, the distance between adjacent first openings is L3, and the distance between adjacent second openings is L4, and L3 and L4 satisfy the following condition: L3>L4.

29. The display device according to claim 28, wherein The L3 and the L4 satisfy the following condition: 1.05≤L3 / L4≤1.

15.

30. The display device according to claim 29, wherein The L4 satisfies the following condition: 0.4 mm ≤ L4 ≤ 1.5 mm.

31. The display device according to claim 25, wherein Along the direction from the third sub-bending portion to the fourth sub-bending portion, the distance between adjacent third openings is L5, and the distance between adjacent fourth openings is L6, and L5 and L6 satisfy the following condition: L5>L6.

32. The display device according to claim 31, wherein: The L5 and the L6 satisfy the following condition: 1.05≤L5 / L6≤1.

15.

33. The display device according to claim 32, wherein: The L6 satisfies the following condition: 0.4 mm ≤ L6 ≤ 1.5 mm.

34. The display device according to claim 25, wherein Along the direction intersecting with the direction from the third sub-bending portion to the fourth sub-bending portion, the distance between adjacent third openings is L7, and the distance between adjacent fourth openings is L8, and L7 and L8 satisfy the following condition: L7>L8.

35. The display device according to claim 34, wherein: The L7 and the L8 satisfy the following condition: 1.05≤L7 / L8≤1.

15.

36. The display device according to claim 35, characterized in that The L8 satisfies the following condition: 0.4 mm ≤ L8 ≤ 1.5 mm.

37. The display device according to claim 34, wherein: The distances between adjacent first openings are all equal, the distances between adjacent second openings are all equal, the distances between adjacent third openings are all equal, and the distances between adjacent fourth openings are all equal.

38. The display device according to claim 24, wherein: Along the direction from the first sub-bend portion to the second sub-bend portion, the length of the first opening portion is L 11 , the length of the second opening is L 12 , the L 11 and the L 12 Meet the following conditions: (0.75)L 12 <L 11 <L 12 .

39. The display device according to claim 38, wherein: Along the direction from the third sub-bend portion to the fourth sub-bend portion, the length of the third opening portion is L 13 , the length of the fourth opening is L 14 , the L 13 and the L 14 Meet the following conditions: (0.75)L 14 <L 13 <L 14 .

40. An electronic device, characterized in that: A display device comprising any one of claims 1-39.

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